Grade 8 Science - Chapter 4 Pre-Test
Name: _______________________________________
Word Bank
Gas Vaporization Melting Point Melting Condensation Boiling Point Sublimation Evaporation Boiling Solid Liquid Flow Rate Freezing Freezing Point Viscosity |
Part A: Fill in the Blanks (15 marks)
________________________________________ changes a liquid to a solid.
A ______________________________________ has both a definite shape and definite volume.
________________________________________ refers to how thick or how thin a fluid is.
________________________________________ is very slow vaporization.
The rate or speed at which a liquid will flow is known as _________________________________________.
The change from a solid to a liquid is known as ___________________________________.
The temperature at which a fluid will boil is known as the ________________________________________.
The change of state which changes a substance from a solid to a gas is _________________________________________.
Rapid vaporization is also known as __________________________________________.
A ________________________________________ has a definite volume but not a definite shape.
The change of states that transforms a liquid to a gas is _____________________________________________.
The temperature at which a substance will melt is known as the _____________________________________________.
A __________________________________________ has neither a definite volume nor shape.
The change from a gas change to a liquid is known as _____________________________________________.
The temperature at which a material will freeze is also known as the ______________________________________________.
Part B: Please complete the particle theory. (8 marks)
1. All matter is made up of ____________________ ________________________.
2. All particles in pure substances are ______________________. Different substances are made up of ___________________________ particles.
3. There are __________________________ between all particles.
4. The particles are always _________________________. As the particles move faster they ____________________ energy.
5. All particles are _____________________________ to other particles.
Part C: Describe how particles act in… (3 marks)
A solid:
A liquid:
A gas:
Part F: Short Answer Questions (15 marks)
What does viscosity mean? What does it mean if a liquid has low viscosity? What if it has a high viscosity?
How could you measure a fluid’s flow rate? Name one fluid that would have a slow flow rate and one fluid that would have a fast flow rate.
What is the relationship between a liquid’s viscosity and flow rate?
What is resistance to flow? How does internal friction affect the flow rate of liquids?
What is a fluid? How can you prove that a finely ground substance, such as salt, is not a fluid?
Part G: Please draw a solid, liquid and a gas below. Underneath each picture list the properties that each states of matter has and how the particles act in each substance. (9 marks)
Part H: True or False (5 marks)
1. A dilute solution will usually have a high viscosity. _________
2. A concentrated solution has more solute than a dilute solution. ___________
3. Usually, when you have a solution with a high concentration, it will also have a high viscosity.______
4. Internal friction refers to how the particles in a substance rub against each other. ________
5. Viscosity means resistance to flow. ____________
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